Exponential-e & BDO
Working together to establish a new standard of excellence for IT service desk operations
About BDO
BDO UK provides tax, audit and assurance, advisory, and business outsourcing services to companies across the public and private sectors, with more than 9,500 employees operating out of 18 office locations across the UK.
The Challenge
In order to better support its analysts across the country, the decision was made to execute a full-scale digital transformation of the entire Virtual Contact Centre and Teams Dialling system, building on the existing investment in Microsoft Teams to establish a centralised platform through which end users could make contact via a range of channels, including voice, email, and chatbot. This would ultimately support the phasing out of legacy telephony in favour of more scalable, flexible omnichannel solutions, while providing team leaders with real-time visibility of the entire service desk operation. The quality of BDO's IT service desk improved as an outcome acknowledged by the Service Desk Institute, who awarded it a four-star rating in 2024.
Critical priorities for the project were simplifying the management of Microsoft Teams licences, which needed to be purchased on an individual basis with the incumbent solution, and streamlining and optimising the user journey wherever possible, taking full advantage of the latest innovations in AI-powered automation and analytics.
A rigorous tender process was conducted, with a key priority being the ability to design and deliver a solution within four months, avoiding any operational disruption. At the end of this process, Exponential-e were selected as the sole technology partner for the project, building on an already strong partnership with BDO, and began working closely with their contact centre and back-office teams to determine the ideal specifications for the new platform.
Based on this findings of this assessment process, Exponential-e's Teams Calling as-a-Service platform, integrated with the industry-leading Five9 Intelligent CX suite and the ServiceNow® ITSM solution, was identified as the perfect fit for BDO's requirements, providing users with the Teams functionality they had come to depend on, while also opening the door to a wide range of potential enhancements.
The Solution
The tools Exponential-e have provided have contributed towards the digital transformation journey BDO have been on. Our mutual passion for the user experience has helped us reshape our whole approach to the service desk, and we're very much looking forward to building on these successes in the years ahead.
Lee Trimmer, Head of Service Delivery, BDO
The first phase of the deployment involved managing a seamless transition for all analysts and end users by replicating their existing Teams functionality in the new platform, allowing them to start making use of it straight away. This meant the migration process was completely invisible to the 6,000 employees already using Teams.
With this foundation in place, BDO began working with their dedicated account team to identify potential opportunities for automation, the first of which involved the onboarding process for new joiners, who would automatically receive an email with the details of the Teams dial pad, with no manual intervention required. At the same time, should an end user leave the company, their account would automatically be closed and their number made available again. This pay-as-you-go model immediately resulted in tangible cost savings by ensuring BDO would only ever pay for the licences in active use.
Building on this, the Five9 platform was heavily customised to suit BDO's specific goals for its overall user journey. Key to this was the integration of the platform's chatbot with BDO's own Azure LLM and ServiceNow®, allowing it full access to an evolving knowledge library. This bespoke chatbot (dubbed ELSA!) is now able to automatically direct users to the article most likely to lead to a successful resolution. If it is unable to do so, they are automatically put through to the appropriate analyst.
ELSA's intuitive, conversational interface and broad range of insights meant the initial uptake was high, averaging more than 200 interactions per month, of which around 50% are resolved with no need for human intervention. The chatbot's capabilities have since been extended to run automated routine fixes with BDO's primary audit tool, saving service desk analysts time and offering the users faster resolutions.
As a result of these improvements, BDO have significantly reduced their service desk's dependence on traditional telephony and email, with most end users now preferring the inherent flexibility and ease of the new chat and self-service options, allowing analysts to more efficiently manage their cases.
With the implementation of Five9's workforce engagement tool, BDO are looking to automate further quality control checks to focus directly on problem areas rather than relying on dip sampling calls. Through the application of intelligent analytics, this identifies which interactions team leaders should listen to in order to support their analysts, identify gaps in the user experience, and act on new opportunities for improvement as they emerge. When combined with the technical data collected by ServiceNow®, this will provide BDO with a holistic, real-time view of its entire service desk operation.
The transformation of BDO's service desk was later recognised at the Service Desk Institute's 2025 awards ceremony, where it was named as 'Service Desk of the Year – Large Team'. It is also now eligible to be certified as a five-star service desk, of which there are only four in the world at the time of writing.
BDO have long led the charge for service desk excellence, and the success of this project is testament to that. When people and technology come together in this way, a seamless, interconnected user experience becomes possible across every channel, which I fully expect to become the new standard for service desk operations.
Gareth Hayes, Head of UC & CX Solutions, Exponential-e
Solution Benefits
- A seamless migration process from disparate
legacy technologies, with no disruption to day-to-day operations
- Intelligent automation of routine processes
enhances analysts' efficiency and performance, freeing them to focus on the
most complex cases
- 50% of all interactions resolved without any
need for human intervention, thanks to a bespoke chatbot and evolving knowledge
base
- Automated onboarding and offboarding of employees and sustainable cost savings through pay-as-you-go pricing
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